Free & open data APIs

One API key.
Dozens of open data sources.

Weather, currency & crypto rates, countries & public holidays, space and nature data, books, food/nutrition, TV shows, Wikipedia, music and trivia — all through one clean, consistent JSON API. Built on the best free open-data sources on the internet, so you don't have to hunt for or juggle a dozen different providers yourself.

Get a free API key Browse the docs
Bitcoin (live)
EUR / USD
London, right now
ISS altitude
Aircraft tracked

Ten categories, one key

Every endpoint below uses the same API key, the same rate-limit headers and the same clean JSON shape — so switching categories doesn't mean learning a new API.

Weather & Environment

Live conditions, multi-day forecasts and air quality for any coordinates on Earth.

  • GET /api/v1/weather/current
  • GET /api/v1/weather/forecast
  • GET /api/v1/weather/air-quality
  • GET /api/v1/weather/geocode

Finance & Crypto

Foreign-exchange rates, currency conversion and live cryptocurrency prices.

  • GET /api/v1/finance/exchange-rates
  • GET /api/v1/finance/convert
  • GET /api/v1/finance/crypto/prices

Geography & Reference

Country data, public holidays for 100+ countries, and IP address geolocation.

  • GET /api/v1/geography/countries
  • GET /api/v1/geography/holidays
  • GET /api/v1/geography/ip-lookup

Space, Nature & Misc

Real-time ISS position, sunrise/sunset times, recent earthquakes and random quotes.

  • GET /api/v1/space/iss-location
  • GET /api/v1/space/sunrise-sunset
  • GET /api/v1/nature/earthquakes
  • GET /api/v1/misc/quote

Books & Culture

Search millions of books and look up full details by ISBN, courtesy of Open Library.

  • GET /api/v1/books/search
  • GET /api/v1/books/isbn/{isbn}

Food & Nutrition

Barcode lookups with nutrition facts, ingredients, allergens and Nutri-Score.

  • GET /api/v1/food/product/{barcode}
  • GET /api/v1/food/search

Entertainment

Search TV shows and pull full details, cast and ratings, courtesy of TVMaze.

  • GET /api/v1/entertainment/shows/search
  • GET /api/v1/entertainment/shows/{id}

Knowledge & Reference

Article summaries and full-text search across Wikipedia.

  • GET /api/v1/knowledge/wikipedia/summary
  • GET /api/v1/knowledge/wikipedia/search

Music

Search artists and album releases from MusicBrainz's open music encyclopedia.

  • GET /api/v1/music/artists/search
  • GET /api/v1/music/releases/search

Trivia & Games

Multiple-choice or true/false trivia questions across dozens of categories.

  • GET /api/v1/games/trivia
  • GET /api/v1/games/trivia/categories

Why developers use FreeOpenAPI.dev

Free, open APIs are scattered across the internet — different auth schemes, different rate limits, different response shapes. FreeOpenAPI.dev wraps the best free open-data providers behind one API key and one consistent JSON style, so you can prototype an idea, power a hobby project, or feed a dashboard without signing up for ten different services first.

Students & learners Real data for coursework and portfolio projects, free to start.
Hobbyists & makers Home automation, Raspberry Pi dashboards, weather displays.
Indie hackers Ship an MVP fast without stitching together ten SDKs.
Get your free API key See all endpoints
Built on trustworthy, well-known open data

Every endpoint is backed by an established, free, publicly documented data source (Open-Meteo, Frankfurter/ECB, CoinGecko, country data, Nager.Date, ip-api.com, Where The ISS At, sunrise-sunset.org, USGS and DummyJSON). We reshape their responses into one consistent format and add key-based auth, rate limiting and caching on top — see Data sources for full attribution.